Sight rib for guns



L. P. SMITH SIGHT RIB FOR GUNS Filed Aug. 27, 1925III!!!Ilfflwffllflilllf rIllI!llllIrIl/ll/IIIIIIII/fl tron, v

Figure Pat nted Mar. 12, 1929.

. LOUIS 1?. SMITH, OF ITHACA, NEW YORK.

SIGHT RIB FOR GUNS.

Application filed August 27, 1925. Serial No. 52,898.'

This invention relates to new and useful f improvements in sight ribsfor guns. The primary object of the invention is to provide a top rib ona gun which is to be used as'a sighting plane and also as a truss to.n.1prevent the barrel from being bent down- ,.1-wardlv.

- r A furtherobject of the invent-ion'is to. providea structure forconnecting the rib to the *gun barrel in such a manner as to permit a Ygreater surface on the barrel to be ventilated or contracted by air forcausing quick cooling 'of the barrel during rapid firing.

A still further object of the inveutionis to prevent the rising of heatwaves from the bar- -rel to such an extent as to blur or nterfere withthe vislon of the shooter.

And" still another object of theinvention is to provide such' aConnection between the 'ribpand the barrel that the heat from the barrelwill be caused to be carried to the rib V to cause the expansion andcontraction of the harrel andrib to be practically the same,

thereby preventing the barrel from buckling "or bendingup or the ribfrom being torn I loose from the barrel.

'Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawing ttorining a -part of this specification andin which like numerals are eiuolo 'ed to-desi 'nate like )arts fthroughout the same,

Figure 1 is a side elevational view ofthe gun barrel and ribembodyingthis inven- 2 is atop plan viewot Fig. 1, Figure 3 Han end elevationalview of the muzzle end of the barrel'and rib, j

Flgure'd is a vertical sectional view taken upon line IVIV ofFig. 1, and

1 Figure 5 is a "fragmentary longitudinal sec i 16011211 view taken uponline VV of'Fig. 2.

In the drawing, wherein'for the purpose of:illustration is shown apreferred embodiment of this invention, the numeral 5 desig a series '01squareor rectangular posts or uprights 8 wh ch are equally spaced fromeach other for forming the transverse ventilating openings or aircirculating passages 9 which permit substantially all of the outersurface of the barrel to be contacted by air tor causing quick coolingof the said barrel during rapid firing. Figures 2 and 5 show the topsurface of the rib 6 transverselygrooved, as at 10, in the manner shown.

Therib 6 is provided with a pair of suitably spaced beads 11 which.permit the rib to be used as a sighting plane.

It will now be seen that the gun barrel 5 will be more quickly cooledduring rapid firing than would be possible if the ventilating openingsor air passages 9 were not provided. The rib will also act as a trussfor preventing the barrel5 from being bent downwardly or away from therib 6. It will, also, be seen that heat from the barrel 5 will radiatethrough the posts or uprights 8 for causing the rib 6 to beequallyheated to bring about substantially equal expansion andcontraction of the barrel and rib, thereby preventing the barrel frombuckling or sending or the rib from being torn loose from the barrel.

It is to be understood thatthe form of this invention herewith shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes in theshape, size, and arrangement or" parts mayberesorted to without departing from the spirit of the in LOUIS P. SMITH.V

